Combination door-lock.



E. H. METCALF.

COMBINATION DOOR LOCK.

APPLICATION FILED Nov. 9. i915.

LWOMOO. O Patented June 20,1916.

K "w W 'rmz CDLUMfllA PLANODRAFH co.. WASHINGTON. D c.

' tion Door-Locks, of which the following is EARL H. METOALF, or salt rnanorsco, CALIFORNIA.

COMBINATION DOOR-LOCK;

Specification of Letters Patent.

Patented June 29, 1916.

Application filed November 9, 1915. Serial No. 60,492.

To all whom it may concern Be it known that I, EARL H. METCALF, a citizen ofthe United States, residing at San Francisco, in the county of San Fran cisco and State of California, have invented new and useful Improvements in Combinaa specification.

The present invention relates to. improvements in door locks, the object of the invention being to provide a simple, economical and reliable combination lock which will dispense with the use of a key for locking -or unlocking the door.

In the accompanying drawing, Figure 1 is a vertical section on the line 11 of Fig. 2 of a door equipped with my invention; Fig. 2 is a cross section thereof on the line 22 of Fig. l; and Fig. 3 is a detail longitudinal section on the line 33 of Fig. 2.

Referring to the drawing, 1 indicates a door, and 2 a lock casing and 3 a latch bolt of an ordinary door lock. 4 indicates an ordinary collar upon a square spindle 6 of a door knob 7, which collar has, in my invention, a single upwardly extending lug 8 adapted to engage a lever 9, which engages a disk 11 secured upon the end of the bolt 3, all of the above being of the usual construction except that only one lug 8 is now used,

instead of two, as is usual.

To prevent the knob being turned there is provided a keeper 12 surrounding the bolt 3, and adjacent to a projection 13 from the collar 4 and adapted to bemOvedtransversely of the bolt when the shank 6 is turned. But, when the door is locked, said keeper can not be so moved, because of the abutment of its upper end against'the peripheries of disks 14, (four being here shown), loose ona shaft 16 in the lock casing. Each of said disks has a recess 17 in its periphery, and when these recesses are brought into registry with the transversely movable keeper '12, but not otherwise, it is possible to move saidkeeper transversely, and therefore unlock the door. Therefore, to unlock the door, it is necessary to turn these disks until all of said recesses are in registry with said transversely movable keeper.

.Each disk 14 has secured thereto a pinion 18, which meshes with a gear wheel'19 loose on a fixed'shaft 21, which gear wheel 19 also meshes with a gear wheel 22 loose on a shaft 23 and'rigidly secured to a ratchet wheel 24. In a recess-in each gear wheel 19 and concentric therewith is a'spiral spring 25 of which one end is secured to the gear wheel and the other engages a groove in the common shaft 21 of said wheels 19 to prevent its rotation. Each of said ratchet wheels 24 is adapted to be advanced in turn by a pawl 26 pivoted on a plate 27 extending integrally from a sleeve 28 and vibratable upon a pin 29 secured to the lock casing 2, said plate being limited in its vibration by means of a' pin-31 extending from said lock casing and passing through a recess 32 in said plate. Dogs 33 engage the teeth of the ratchet wheels '24 to prevent backward rotation thereof.

A plate 34 is attached 'to the door by screws and through said plate extends a tubular stem 36, on the outer end of which is secured-a knob 37, and into the inner end is screwed said sleeve 28. A locking screw 35, shown in .dotted lines in Fig. 2, is screwed into the tubular stem and locks said sleevein positioninsaid stem. To said stem is also secured, by a set screw 40,

a disk or flange 38, which is adapted to rotate through. any one of a longitudinal series of notches 39 in the lower edge of a plate 41in a casing 42 secured to the plate 34, and which is normally pressed downward by springs 43.

The operation is as follows:Suppose that the number of the combination is 6238. The operator vibrates the knob 37 six times through a small are, said oscillation being limited by the engagement of the pin 31 in the recess 32. He thereby also correspondingly vibrates the plate 27 and advances the first of the four ratchet wheels 24 six times a certain distance against the action of the spring 25, which engages the corresponding gear wheel 19. The operator thereby brings the first disk 14 to such a position that the recess 17 therein registers with the transversely movable keeper 12. He then withdraws the knob 37 through the distance between two notches 39,. thereby'moving the plate 27 until the pawl 26 engages the next ratchet wheel 24. He then imparts two vibratory movements to the knob 37, moving the ratchet wheel two notches and bringing the recess 17 in the next disk back into registry with the keeper 12. He then again determines the starting point ofsaid gear wheel 19. The combination can be changed by removing the disks 14 from the'shaft 1G, turning them around said shaft until other parts ofthe pinions 1S,rigid with the disks 14, can mesh respectively with the gear wheels 19, the recesses 17 being then'at different angular distances from the point 0pposite to the keeper 12, and then replacing them. p

In orderto preventthe stem 36 from being pulled out more than the distance between'two adjacent notches at one time, I provide a safety cylinder, 46 rotatably mounted upon a shaft 47 screwed into the casing 2 and one end 48 of which is square.

A spring 49 bears against a side of this squareend. This cylinder is provided with a series of four pins 51, arranged at equal angular intervals around the circumference of the cylinder, and longitudinally of the cylinder at intervals equal to the distance between two adjacent notches. In the nor mal position of the stem 36, a recessed portion 52 'of thefedge of the flange lies in the first notch 39 and'the first pin 51 lies in a recessed portion 53 of the edge of the flange diametrically opposite to the recessed portion 52. lVhen the stem is vibrated to move the flange through the first notch, a shoulder 54 of the recessed portion 53 presses against the first pin 51 and thereby imparts a onequarter turn to the cylinder 46,'being assisted in the latter part of its movement by the pressure of'the spring 49. WVhen the flange has been vibrated the required number of times and then drawn outward through the distance between two notches 39,"it' is, arrested by the'first of, a second series of three pins 56. Then said flange and stem can not be moved any farther out- I wardly, until the stem has first been [vibrated in its new position, thus causing the shoulder 54 to engage the next pin 51 and turnthe safety cylinder another quarter turn. In

like manner each of the other pins 56 prewvents. the further outward movement of the i flange and stem until the corresponding pin 51 hasrbeen rotated by the flange. When plate 57 extending from a lever 58, pivoted upon the lock casing, to raise said plate, so as to raise all of the dogs 33 out of engagement with the ratchet wheels 24, whereupon the disks 14 are returned by the springs 25 to their initial position in which the lugs 44 engage the peripheries of said disks.

7 59 indicates a stop, the-stem 61 of which is slidable in a guide 62, and is withdrawn by a spring 63. It has a recess 64 engaged by a finger extending inwardly from a handle 65 and adapted to be interposed between the inner end of the latch bolt 3 and the latch casing 2 to prevent the latch bolt from being withdrawn.

I claim z 1. In combination with alatching bolt of a door, a keeper movable with the bolt, a

series of disks each having in its periphery a recess to receive said keeper when so moved, a vibratable device extending to the outside of the door, and movable into posi tions tobe operatively connected with each disk in succession, and operative connectionsbetween said disks and said device in its several positions whereby in any one of said positions successive complete vibrations of the device impart successive uniform movements in the same direction to the disk to move it toward a position in which the recess therein can receive said keeper.

2. In combination with a latching bolt of a door, a keeper movable with the bolt, a series of disks each having in its periphery a recess to receive said keeper when so moved, a series of ratchet wheels operatively connected respectively with the disks, a pawl for operating said ratchet wheels, a device operatively connected to said pawl and extending to the outside of the door, means for moving said device to cause the pawl to engage each of said ratchet wheels in succession to advance the corresponding disk, a dog for preventing return movement of each ratchet wheel, and a spring for resisting said advancing movement of the disk.

3. In combination with a latching bolt of a door, a keeper movable with the bolt, a series of disks each having in its periphery a recess to receive said keeper when so moved, a vibratable device extending to the outside of the door and movable into positions to be operatively connected with each disk in succession, operative connections between said disks and said device in 1ts several positionswhereby in any one of said positions successive complete vibrations of the device impart successive uniform movements in the same direction to the disk to move it toward a position in which a recess therein can receive said keeper, and means for limiting the extent of vibration of said device.

4. In combination with a latching bolt and a door handle for withdrawing said bolt, a

keeper movable transversely across said latching bolt with the withdrawing movement of the handle, a series of rotary coaxial disks against the peripheries of which said keeper abuts to prevent said withdrawing movement of the handle, each of said disks having in its periphery a recess to receive said keeper, a corresponding series of ratchet wheels, an operative connection between each ratchet wheel and the corresponding disk, whereby the advancing movement of the ratchet wheel turns the corre sponding disk, a spring for resisting the ad vancing movement of each ratchet wheel and disk, a dog for preventing return movement of each ratchet wheel, a pawl adapted to engage any one of said ratchet wheels, and a device extending outside the door and operatively connected with said pawl, whereby said pawl can be operated by said device to advance the ratchet wheel any desired angular distance.

5. In combination with a latching bolt and a door handle for withdrawing said bolt, a keeper movable transversely across said latching bolt with the withdrawing movement of the handle, a series of rotary coaxial disks against the peripheries of which said keeper abuts to prevent said withdrawing movement of the-handle, each of said disks having in its periphery a recess to receive said keeper, a corresponding series of ratchet wheels, a train of gears operatively connecting eac'h ratchet wheel with the corresponding disk, whereby the advancing movement of the ratchet Wheel turns the corresponding disk, a spring for resisting the advancing movement of each ratchet wheel and disk, a dog for preventing return movement of each ratchet wheel, a pawl adapted to engage any one of said ratchet wheels, a device extending outside the door and operatively connected with said pawl, whereby said pawl can be operated by said device to advance the ratchet wheel any desired angular distance, and a stop on one gear of each train engaging the periphery of the corresponding disk.

6. In combination with a latching bolt of a door, a keeper movable with the bolt, a series of disks each having in its periphery a recess to receive said keeper when so moved, a device extending to the outside of the door, and movable into positions to be operatively connected with each diskin succession, operative connections from said device in itsseveral positions to said disks, to move them successively into positions in which all of said recesses can receive said keeper, means for individually returning said disks to their normal position, individual devices for preventing said return movement, and means adapted to be engaged by the firstnamed device in another position for rendering all of said individual devices inoperativc.

7 In combination with a latching bolt and a door handle for withdrawing said bolt, a keeper movable with the handle, a series of disks each having in its periphery a recess to receive said keeper when so moved, a series of ratchet wheels operatively connected respectively with the disks, a pawl for operating said ratchet wheels, a device operatively connected to said pawl and extending to the outside of the door, means for moving said device to cause the pawl to engage each of said ratchet wheels in succession to advance the corresponding disk, a dog for preventing return movement of each ratchet wheel, a spring for resisting said advancing movement 01": the disk, and means adapted to be engaged by said device in another position for withdrawing all of said dogs.

8. In a lock, the combination of a phi-- rality of disks for controlling a bolt, a vibrating device movable into a series of successive operative positions, operative connections between said vibrating device in the successive positions and the respective disks, whereby the vibration of the device in any position advances the corresponding disk, and means for controlling the movement of the device into its successive operative positions, comprising means for arresting the movement of the device when moved from one position to the next succeeding position, and means whereby the vibration of the device removes said arresting means.

9. In a lock, the combination of a plurality of disks for controlling a bolt, a vibrating device movable into a series of successive operative positions, operative connections between said vibrating device in the successive positions and the respective disks, whereby the vibration of the device in any position advances the corresponding disk, and means for controlling the movement of the device into its successive operative positions, comprising a rotary cylinder having a polygonal face, a spring bearing against a side of said face, a flange rigidly secured to the device, a spring-actuated plate having notches through any one of which said flange can vibrate with the device, said flange having a recess through which said plate extends when the flange is moved in an axial direction from one notch a 4: V I 1,188,003

to the next, a pin .on said cylinder arresting my hand in the presence of two subscribing the axial movement of the flange when arnvd Witnesses.

ing at each successive notch an a pin on said cylinder arranged to he engaged by EARL METCALF' said flange to turn the cylinder when the Witnesses:

i deviceis vibrated. n G. M. BALL,

' In testimonyiwhereof I have hereunto set D. B; RICHARDS.

Copies bf this patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

Washington, D. O. 

